74881840 has 40 divisors (see below), whose sum is σ = 189929808. Its totient is φ = 27229440.

The previous prime is 74881837. The next prime is 74881843. The reversal of 74881840 is 4818847.

It is an interprime number because it is at equal distance from previous prime (74881837) and next prime (74881843).

It is a tau number, because it is divible by the number of its divisors (40).

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

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 = 74881793 and 74881802.

It is not an unprimeable number, because it can be changed into a prime (74881843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41667 + ... + 43426.

Almost surely, 2^74881840 is an apocalyptic number.

It is an amenable number.

74881840 is an abundant number, since it is smaller than the sum of its proper divisors (115047968).

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

74881840 is a wasteful number, since it uses less digits than its factorization.

74881840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85117 (or 85111 counting only the distinct ones).

The product of its (nonzero) digits is 57344, while the sum is 40.

The square root of 74881840 is about 8653.4293779981. The cubic root of 74881840 is about 421.4947495696.

The spelling of 74881840 in words is "seventy-four million, eight hundred eighty-one thousand, eight hundred forty".