61156428 has 48 divisors (see below), whose sum is σ = 149237760. Its totient is φ = 19468800.

The previous prime is 61156427. The next prime is 61156441. The reversal of 61156428 is 82465116.

It is not an unprimeable number, because it can be changed into a prime (61156427) 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, 28348 + ... + 30428.

It is an arithmetic number, because the mean of its divisors is an integer number (3109120).

Almost surely, 2^61156428 is an apocalyptic number.

It is an amenable number.

61156428 is an abundant number, since it is smaller than the sum of its proper divisors (88081332).

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

61156428 is a wasteful number, since it uses less digits than its factorization.

61156428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2198 (or 2196 counting only the distinct ones).

The product of its digits is 11520, while the sum is 33.

The square root of 61156428 is about 7820.2575405162. The cubic root of 61156428 is about 393.9859220064.

The spelling of 61156428 in words is "sixty-one million, one hundred fifty-six thousand, four hundred twenty-eight".