40390086 has 64 divisors (see below), whose sum is σ = 95846400. Its totient is φ = 11210400.

The previous prime is 40390073. The next prime is 40390109. The reversal of 40390086 is 68009304.

40390086 = 1449² + 1450² + ... + 1467².

It is a Curzon number.

It is a congruent number.

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, 38355 + ... + 39393.

It is an arithmetic number, because the mean of its divisors is an integer number (1497600).

Almost surely, 2^40390086 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40390086, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47923200).

40390086 is an abundant number, since it is smaller than the sum of its proper divisors (55456314).

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

40390086 is a wasteful number, since it uses less digits than its factorization.

40390086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1105.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 40390086 is about 6355.3195041634. The cubic root of 40390086 is about 343.1033243331.

The spelling of 40390086 in words is "forty million, three hundred ninety thousand, eighty-six".