74263428 has 18 divisors (see below), whose sum is σ = 187721534. Its totient is φ = 24754464.

The previous prime is 74263393. The next prime is 74263433. The reversal of 74263428 is 82436247.

It can be written as a sum of positive squares in only one way, i.e., 58247424 + 16016004 = 7632^2 + 4002^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×74263428² = 11030113476622368, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 2062873 = 74263428 / (7 + 4 + 2 + 6 + 3 + 4 + 2 + 8).

It is a junction number, because it is equal to n+sod(n) for n = 74263392 and 74263401.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1031401 + ... + 1031472.

Almost surely, 2^74263428 is an apocalyptic number.

It is an amenable number.

74263428 is an abundant number, since it is smaller than the sum of its proper divisors (113458106).

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

74263428 is a wasteful number, since it uses less digits than its factorization.

74263428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2062883 (or 2062878 counting only the distinct ones).

The product of its digits is 64512, while the sum is 36.

The square root of 74263428 is about 8617.6231061703. The cubic root of 74263428 is about 420.3312352994.

It can be divided in two parts, 74263 and 428, that added together give a triangular number (74691 = T₃₈₆).

The spelling of 74263428 in words is "seventy-four million, two hundred sixty-three thousand, four hundred twenty-eight".