40279788 has 96 divisors (see below), whose sum is σ = 110315520. Its totient is φ = 12692160.

The previous prime is 40279747. The next prime is 40279823. The reversal of 40279788 is 88797204.

It is a super-2 number, since 2×40279788² = 3244922642649888, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 177331 + ... + 177557.

It is an arithmetic number, because the mean of its divisors is an integer number (1149120).

Almost surely, 2^40279788 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40279788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55157760).

40279788 is an abundant number, since it is smaller than the sum of its proper divisors (70035732).

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

40279788 is a wasteful number, since it uses less digits than its factorization.

40279788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324 (or 316 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The square root of 40279788 is about 6346.6359593095. The cubic root of 40279788 is about 342.7907219547.

The spelling of 40279788 in words is "forty million, two hundred seventy-nine thousand, seven hundred eighty-eight".