1097957550 has 96 divisors (see below), whose sum is σ = 2799820800. Its totient is φ = 284636160.

The previous prime is 1097957537. The next prime is 1097957551. The reversal of 1097957550 is 557597901.

It is a self number, because there is not a number n which added to its sum of digits gives 1097957550.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1097957551) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 857811 + ... + 859089.

It is an arithmetic number, because the mean of its divisors is an integer number (29164800).

Almost surely, 2^1097957550 is an apocalyptic number.

1097957550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1097957550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1399910400).

1097957550 is an abundant number, since it is smaller than the sum of its proper divisors (1701863250).

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

1097957550 is a wasteful number, since it uses less digits than its factorization.

1097957550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1450 (or 1445 counting only the distinct ones).

The product of its (nonzero) digits is 496125, while the sum is 48.

The square root of 1097957550 is about 33135.4425049674. The cubic root of 1097957550 is about 1031.6408164269.

The spelling of 1097957550 in words is "one billion, ninety-seven million, nine hundred fifty-seven thousand, five hundred fifty".