74919420 has 36 divisors (see below), whose sum is σ = 227256120. Its totient is φ = 19978464.

The previous prime is 74919401. The next prime is 74919421. The reversal of 74919420 is 2491947.

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

It is a super-2 number, since 2×74919420² = 11225838986272800, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74919421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 207930 + ... + 208289.

It is an arithmetic number, because the mean of its divisors is an integer number (6312670).

Almost surely, 2^74919420 is an apocalyptic number.

It is an amenable number.

74919420 is an abundant number, since it is smaller than the sum of its proper divisors (152336700).

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

74919420 is a wasteful number, since it uses less digits than its factorization.

74919420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416234 (or 416229 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 74919420 is about 8655.6004990988. The cubic root of 74919420 is about 421.5652478535.

The spelling of 74919420 in words is "seventy-four million, nine hundred nineteen thousand, four hundred twenty".