74820140 has 24 divisors (see below), whose sum is σ = 157589712. Its totient is φ = 29839040.

The previous prime is 74820131. The next prime is 74820149. The reversal of 74820140 is 4102847.

It is an interprime number because it is at equal distance from previous prime (74820131) and next prime (74820149).

It is not an unprimeable number, because it can be changed into a prime (74820149) 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, 1550 + ... + 12330.

It is an arithmetic number, because the mean of its divisors is an integer number (6566238).

Almost surely, 2^74820140 is an apocalyptic number.

It is an amenable number.

74820140 is an abundant number, since it is smaller than the sum of its proper divisors (82769572).

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

74820140 is a wasteful number, since it uses less digits than its factorization.

74820140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11137 (or 11135 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 74820140 is about 8649.8635827393. The cubic root of 74820140 is about 421.3789521477.

Adding to 74820140 its reverse (4102847), we get a palindrome (78922987).

The spelling of 74820140 in words is "seventy-four million, eight hundred twenty thousand, one hundred forty".