72408402 has 24 divisors (see below), whose sum is σ = 171147600. Its totient is φ = 21941880.

The previous prime is 72408397. The next prime is 72408407. The reversal of 72408402 is 20480427.

It is an interprime number because it is at equal distance from previous prime (72408397) and next prime (72408407).

It is not an unprimeable number, because it can be changed into a prime (72408407) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 182652 + ... + 183047.

It is an arithmetic number, because the mean of its divisors is an integer number (7131150).

Almost surely, 2^72408402 is an apocalyptic number.

72408402 is an abundant number, since it is smaller than the sum of its proper divisors (98739198).

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

72408402 is a wasteful number, since it uses less digits than its factorization.

72408402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365718 (or 365715 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 27.

The square root of 72408402 is about 8509.3126631944. The cubic root of 72408402 is about 416.8018657439.

Adding to 72408402 its reverse (20480427), we get a palindrome (92888829).

The spelling of 72408402 in words is "seventy-two million, four hundred eight thousand, four hundred two".