61357428 has 36 divisors (see below), whose sum is σ = 169198848. Its totient is φ = 18593040.

The previous prime is 61357427. The next prime is 61357453. The reversal of 61357428 is 82475316.

61357428 is a `hidden beast` number, since 61 + 3 + 574 + 28 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 61357392 and 61357401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61357421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 77076 + ... + 77867.

It is an arithmetic number, because the mean of its divisors is an integer number (4699968).

Almost surely, 2^61357428 is an apocalyptic number.

It is an amenable number.

61357428 is an abundant number, since it is smaller than the sum of its proper divisors (107841420).

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

61357428 is a wasteful number, since it uses less digits than its factorization.

61357428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154964 (or 154959 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 61357428 is about 7833.0982376069. The cubic root of 61357428 is about 394.4170817552.

The spelling of 61357428 in words is "sixty-one million, three hundred fifty-seven thousand, four hundred twenty-eight".