61739472 has 20 divisors (see below), whose sum is σ = 159493760. Its totient is φ = 20579808.

The previous prime is 61739459. The next prime is 61739497. The reversal of 61739472 is 27493716.

It is a self number, because there is not a number n which added to its sum of digits gives 61739472.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 643072 + ... + 643167.

It is an arithmetic number, because the mean of its divisors is an integer number (7974688).

Almost surely, 2^61739472 is an apocalyptic number.

It is an amenable number.

61739472 is an abundant number, since it is smaller than the sum of its proper divisors (97754288).

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

61739472 is a wasteful number, since it uses less digits than its factorization.

61739472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1286250 (or 1286244 counting only the distinct ones).

The product of its digits is 63504, while the sum is 39.

The square root of 61739472 is about 7857.4469135973. The cubic root of 61739472 is about 395.2340054442.

The spelling of 61739472 in words is "sixty-one million, seven hundred thirty-nine thousand, four hundred seventy-two".