61902840 has 32 divisors (see below), whose sum is σ = 185708880. Its totient is φ = 16507392.

The previous prime is 61902839. The next prime is 61902847. The reversal of 61902840 is 4820916.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 61902798 and 61902807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61902847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 257809 + ... + 258048.

Almost surely, 2^61902840 is an apocalyptic number.

61902840 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61902840 is an abundant number, since it is smaller than the sum of its proper divisors (123806040).

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

61902840 is a wasteful number, since it uses less digits than its factorization.

61902840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515871 (or 515867 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 61902840 is about 7867.8357888304. The cubic root of 61902840 is about 395.5823062375.

The spelling of 61902840 in words is "sixty-one million, nine hundred two thousand, eight hundred forty".