61424428 has 24 divisors (see below), whose sum is σ = 117729360. Its totient is φ = 27867840.

The previous prime is 61424411. The next prime is 61424449. The reversal of 61424428 is 82442416.

It is a super-3 number, since 3×61424428³ (a number of 24 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 61424428.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6943 + ... + 13078.

It is an arithmetic number, because the mean of its divisors is an integer number (4905390).

Almost surely, 2^61424428 is an apocalyptic number.

It is an amenable number.

61424428 is a deficient number, since it is larger than the sum of its proper divisors (56304932).

61424428 is a wasteful number, since it uses less digits than its factorization.

61424428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20097 (or 20095 counting only the distinct ones).

The product of its digits is 12288, while the sum is 31.

The square root of 61424428 is about 7837.3737948371. The cubic root of 61424428 is about 394.5605923969.

The spelling of 61424428 in words is "sixty-one million, four hundred twenty-four thousand, four hundred twenty-eight".