40392690 has 96 divisors (see below), whose sum is σ = 108781056. Its totient is φ = 9584640.

The previous prime is 40392661. The next prime is 40392691. The reversal of 40392690 is 9629304.

It is a super-2 number, since 2×40392690² = 3263138810872200, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40392691) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 157042 + ... + 157298.

It is an arithmetic number, because the mean of its divisors is an integer number (1133136).

Almost surely, 2^40392690 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40392690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54390528).

40392690 is an abundant number, since it is smaller than the sum of its proper divisors (68388366).

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

40392690 is a wasteful number, since it uses less digits than its factorization.

40392690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324 (or 311 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 40392690 is about 6355.5243686104. The cubic root of 40392690 is about 343.1106976099.

The spelling of 40392690 in words is "forty million, three hundred ninety-two thousand, six hundred ninety".