61458728 has 8 divisors (see below), whose sum is σ = 115235130. Its totient is φ = 30729360.

The previous prime is 61458701. The next prime is 61458763. The reversal of 61458728 is 82785416.

It can be written as a sum of positive squares in only one way, i.e., 41190724 + 20268004 = 6418^2 + 4502^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3841163 + ... + 3841178.

Almost surely, 2^61458728 is an apocalyptic number.

It is an amenable number.

61458728 is a deficient number, since it is larger than the sum of its proper divisors (53776402).

61458728 is a wasteful number, since it uses less digits than its factorization.

61458728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7682347 (or 7682343 counting only the distinct ones).

The product of its digits is 107520, while the sum is 41.

The square root of 61458728 is about 7839.5617224434. The cubic root of 61458728 is about 394.6340208926.

The spelling of 61458728 in words is "sixty-one million, four hundred fifty-eight thousand, seven hundred twenty-eight".