74724020 has 36 divisors (see below), whose sum is σ = 182542500. Its totient is φ = 25619328.

The previous prime is 74724007. The next prime is 74724059. The reversal of 74724020 is 2042747.

It can be written as a sum of positive squares in 2 ways, for example, as 35736484 + 38987536 = 5978^2 + 6244^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37145 + ... + 39104.

It is an arithmetic number, because the mean of its divisors is an integer number (5070625).

Almost surely, 2^74724020 is an apocalyptic number.

74724020 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

74724020 is an abundant number, since it is smaller than the sum of its proper divisors (107818480).

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

74724020 is a wasteful number, since it uses less digits than its factorization.

74724020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76272 (or 76263 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 26.

The square root of 74724020 is about 8644.3056401310. The cubic root of 74724020 is about 421.1984289992.

Adding to 74724020 its reverse (2042747), we get a palindrome (76766767).

The spelling of 74724020 in words is "seventy-four million, seven hundred twenty-four thousand, twenty".