74788240 has 20 divisors (see below), whose sum is σ = 173882844. Its totient is φ = 29915264.

The previous prime is 74788201. The next prime is 74788243. The reversal of 74788240 is 4288747.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 53406864 + 21381376 = 7308^2 + 4624^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 74788193 and 74788202.

It is not an unprimeable number, because it can be changed into a prime (74788243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 467347 + ... + 467506.

Almost surely, 2^74788240 is an apocalyptic number.

It is an amenable number.

74788240 is an abundant number, since it is smaller than the sum of its proper divisors (99094604).

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

74788240 is a wasteful number, since it uses less digits than its factorization.

74788240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 934866 (or 934860 counting only the distinct ones).

The product of its (nonzero) digits is 100352, while the sum is 40.

The square root of 74788240 is about 8648.0194264352. The cubic root of 74788240 is about 421.3190578492.

The spelling of 74788240 in words is "seventy-four million, seven hundred eighty-eight thousand, two hundred forty".