61192920 has 64 divisors (see below), whose sum is σ = 193248000. Its totient is φ = 15458688.

The previous prime is 61192889. The next prime is 61192921. The reversal of 61192920 is 2929116.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61192921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11140 + ... + 15699.

It is an arithmetic number, because the mean of its divisors is an integer number (3019500).

Almost surely, 2^61192920 is an apocalyptic number.

61192920 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61192920 is an abundant number, since it is smaller than the sum of its proper divisors (132055080).

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

61192920 is a wasteful number, since it uses less digits than its factorization.

61192920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26872 (or 26868 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 61192920 is about 7822.5903638117. The cubic root of 61192920 is about 394.0642701377.

The spelling of 61192920 in words is "sixty-one million, one hundred ninety-two thousand, nine hundred twenty".