74240520 has 32 divisors (see below), whose sum is σ = 222721920. Its totient is φ = 19797440.

The previous prime is 74240519. The next prime is 74240521. The reversal of 74240520 is 2504247.

It is an interprime number because it is at equal distance from previous prime (74240519) and next prime (74240521).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (74240521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 309216 + ... + 309455.

It is an arithmetic number, because the mean of its divisors is an integer number (6960060).

Almost surely, 2^74240520 is an apocalyptic number.

It is an amenable number.

74240520 is an abundant number, since it is smaller than the sum of its proper divisors (148481400).

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

74240520 is a wasteful number, since it uses less digits than its factorization.

74240520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 618685 (or 618681 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 24.

The square root of 74240520 is about 8616.2938668548. The cubic root of 74240520 is about 420.2880110707.

Adding to 74240520 its reverse (2504247), we get a palindrome (76744767).

The spelling of 74240520 in words is "seventy-four million, two hundred forty thousand, five hundred twenty".