61469920 has 24 divisors (see below), whose sum is σ = 145223064. Its totient is φ = 24587904.

The previous prime is 61469911. The next prime is 61469923. The reversal of 61469920 is 2996416.

It is a self number, because there is not a number n which added to its sum of digits gives 61469920.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61469923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 191934 + ... + 192253.

It is an arithmetic number, because the mean of its divisors is an integer number (6050961).

Almost surely, 2^61469920 is an apocalyptic number.

It is an amenable number.

61469920 is an abundant number, since it is smaller than the sum of its proper divisors (83753144).

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

61469920 is a wasteful number, since it uses less digits than its factorization.

61469920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384202 (or 384194 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 61469920 is about 7840.2755053633. The cubic root of 61469920 is about 394.6579745062.

The spelling of 61469920 in words is "sixty-one million, four hundred sixty-nine thousand, nine hundred twenty".