61860728 has 8 divisors (see below), whose sum is σ = 115988880. Its totient is φ = 30930360.

The previous prime is 61860719. The next prime is 61860737. The reversal of 61860728 is 82706816.

It is an interprime number because it is at equal distance from previous prime (61860719) and next prime (61860737).

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 61860691 and 61860700.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3866288 + ... + 3866303.

It is an arithmetic number, because the mean of its divisors is an integer number (14498610).

Almost surely, 2^61860728 is an apocalyptic number.

It is an amenable number.

61860728 is a deficient number, since it is larger than the sum of its proper divisors (54128152).

61860728 is a wasteful number, since it uses less digits than its factorization.

61860728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7732597 (or 7732593 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 61860728 is about 7865.1591210859. The cubic root of 61860728 is about 395.4925820766.

The spelling of 61860728 in words is "sixty-one million, eight hundred sixty thousand, seven hundred twenty-eight".