40620288 has 72 divisors (see below), whose sum is σ = 109051488. Its totient is φ = 13422592.

The previous prime is 40620269. The next prime is 40620289. The reversal of 40620288 is 88202604.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (40620289) 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, 174220 + ... + 174452.

It is an arithmetic number, because the mean of its divisors is an integer number (1514604).

Almost surely, 2^40620288 is an apocalyptic number.

40620288 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40620288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54525744).

40620288 is an abundant number, since it is smaller than the sum of its proper divisors (68431200).

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

40620288 is a wasteful number, since it uses less digits than its factorization.

40620288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479 (or 465 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 30.

The square root of 40620288 is about 6373.4047415804. The cubic root of 40620288 is about 343.7539253326.

The spelling of 40620288 in words is "forty million, six hundred twenty thousand, two hundred eighty-eight".