1097542620 has 72 divisors (see below), whose sum is σ = 3353588784. Its totient is φ = 290535168.

The previous prime is 1097542597. The next prime is 1097542643. The reversal of 1097542620 is 262457901.

1097542620 is a `hidden beast` number, since 1 + 0 + 97 + 542 + 6 + 20 = 666.

1097542620 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1097542597) and next prime (1097542643).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2407 + ... + 46913.

It is an arithmetic number, because the mean of its divisors is an integer number (46577622).

Almost surely, 2^1097542620 is an apocalyptic number.

1097542620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1097542620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1676794392).

1097542620 is an abundant number, since it is smaller than the sum of its proper divisors (2256046164).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1097542620 is a wasteful number, since it uses less digits than its factorization.

1097542620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44659 (or 44654 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 1097542620 is about 33129.1807927694. The cubic root of 1097542620 is about 1031.5108439891.

The spelling of 1097542620 in words is "one billion, ninety-seven million, five hundred forty-two thousand, six hundred twenty".