74775780 has 72 divisors (see below), whose sum is σ = 230053824. Its totient is φ = 19656000.

The previous prime is 74775769. The next prime is 74775797. The reversal of 74775780 is 8757747.

It is a happy number.

74775780 is a `hidden beast` number, since 7 + 4 + 77 + 578 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 9855 + ... + 15705.

It is an arithmetic number, because the mean of its divisors is an integer number (3195192).

Almost surely, 2^74775780 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74775780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115026912).

74775780 is an abundant number, since it is smaller than the sum of its proper divisors (155278044).

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

74775780 is a wasteful number, since it uses less digits than its factorization.

74775780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5937 (or 5932 counting only the distinct ones).

The product of its (nonzero) digits is 384160, while the sum is 45.

The square root of 74775780 is about 8647.2990002659. The cubic root of 74775780 is about 421.2956587737.

The spelling of 74775780 in words is "seventy-four million, seven hundred seventy-five thousand, seven hundred eighty".