40240690 has 64 divisors (see below), whose sum is σ = 87816960. Its totient is φ = 12983040.

The previous prime is 40240657. The next prime is 40240691. The reversal of 40240690 is 9604204.

It is a super-2 number, since 2×40240690² = 3238626263352200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40240691) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 87060 + ... + 87520.

It is an arithmetic number, because the mean of its divisors is an integer number (1372140).

Almost surely, 2^40240690 is an apocalyptic number.

40240690 is an abundant number, since it is smaller than the sum of its proper divisors (47576270).

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

40240690 is a wasteful number, since it uses less digits than its factorization.

40240690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 40240690 is about 6343.5549970029. The cubic root of 40240690 is about 342.6797749094.

Adding to 40240690 its reverse (9604204), we get a palindrome (49844894).

The spelling of 40240690 in words is "forty million, two hundred forty thousand, six hundred ninety".