74878440 has 128 divisors (see below), whose sum is σ = 276514560. Its totient is φ = 15796224.

The previous prime is 74878439. The next prime is 74878457. The reversal of 74878440 is 4487847.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 74878392 and 74878401.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7492 + ... + 14348.

It is an arithmetic number, because the mean of its divisors is an integer number (2160270).

Almost surely, 2^74878440 is an apocalyptic number.

74878440 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 74878440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138257280).

74878440 is an abundant number, since it is smaller than the sum of its proper divisors (201636120).

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

74878440 is a wasteful number, since it uses less digits than its factorization.

74878440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6891 (or 6887 counting only the distinct ones).

The product of its (nonzero) digits is 200704, while the sum is 42.

The square root of 74878440 is about 8653.2329218622. The cubic root of 74878440 is about 421.4883701686.

The spelling of 74878440 in words is "seventy-four million, eight hundred seventy-eight thousand, four hundred forty".