75742740 has 72 divisors (see below), whose sum is σ = 241856160. Its totient is φ = 19134144.

The previous prime is 75742739. The next prime is 75742753. The reversal of 75742740 is 4724757.

It is a happy number.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct 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 = 75742695 and 75742704.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7654 + ... + 14493.

Almost surely, 2^75742740 is an apocalyptic number.

It is an amenable number.

75742740 is an abundant number, since it is smaller than the sum of its proper divisors (166113420).

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

75742740 is a wasteful number, since it uses less digits than its factorization.

75742740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22181 (or 22176 counting only the distinct ones).

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

The square root of 75742740 is about 8703.0305066684. The cubic root of 75742740 is about 423.1038760366.

The spelling of 75742740 in words is "seventy-five million, seven hundred forty-two thousand, seven hundred forty".