40642490 has 16 divisors (see below), whose sum is σ = 83607552. Its totient is φ = 13934544.

The previous prime is 40642489. The next prime is 40642499. The reversal of 40642490 is 9424604.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40642499) 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, 290234 + ... + 290373.

It is an arithmetic number, because the mean of its divisors is an integer number (5225472).

Almost surely, 2^40642490 is an apocalyptic number.

40642490 is an abundant number, since it is smaller than the sum of its proper divisors (42965062).

40642490 is a wasteful number, since it uses less digits than its factorization.

40642490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580621.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 40642490 is about 6375.1462728317. The cubic root of 40642490 is about 343.8165429305.

The spelling of 40642490 in words is "forty million, six hundred forty-two thousand, four hundred ninety".