74931780 has 192 divisors, whose sum is σ = 267724800. Its totient is φ = 15523200.

The previous prime is 74931721. The next prime is 74931781. The reversal of 74931780 is 8713947.

It is a super-2 number, since 2×74931780² = 11229543307936800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (74931781) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 226215 + ... + 226545.

It is an arithmetic number, because the mean of its divisors is an integer number (1394400).

Almost surely, 2^74931780 is an apocalyptic number.

74931780 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74931780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133862400).

74931780 is an abundant number, since it is smaller than the sum of its proper divisors (192793020).

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

74931780 is a wasteful number, since it uses less digits than its factorization.

74931780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375 (or 359 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 39.

The square root of 74931780 is about 8656.3144582438. The cubic root of 74931780 is about 421.5884294707.

The spelling of 74931780 in words is "seventy-four million, nine hundred thirty-one thousand, seven hundred eighty".