74772540 has 72 divisors (see below), whose sum is σ = 236684448. Its totient is φ = 19071360.

The previous prime is 74772499. The next prime is 74772553. The reversal of 74772540 is 4527747.

It is a happy number.

74772540 is a `hidden beast` number, since 7 + 47 + 72 + 540 = 666.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

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 = 74772495 and 74772504.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4891 + ... + 13170.

It is an arithmetic number, because the mean of its divisors is an integer number (3287284).

Almost surely, 2^74772540 is an apocalyptic number.

It is an amenable number.

74772540 is an abundant number, since it is smaller than the sum of its proper divisors (161911908).

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

74772540 is a wasteful number, since it uses less digits than its factorization.

74772540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18099 (or 18094 counting only the distinct ones).

The product of its (nonzero) digits is 54880, while the sum is 36.

The square root of 74772540 is about 8647.1116565013. Note that the first 3 decimals coincide. The cubic root of 74772540 is about 421.2895738371.

The spelling of 74772540 in words is "seventy-four million, seven hundred seventy-two thousand, five hundred forty".