40400454 has 16 divisors (see below), whose sum is σ = 80980992. Its totient is φ = 13436808.

The previous prime is 40400453. The next prime is 40400513. The reversal of 40400454 is 45400404.

It is a super-2 number, since 2×40400454² = 3264393366812232, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40400454.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40400453) 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, 4494 + ... + 10049.

It is an arithmetic number, because the mean of its divisors is an integer number (5061312).

Almost surely, 2^40400454 is an apocalyptic number.

40400454 is an abundant number, since it is smaller than the sum of its proper divisors (40580538).

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

40400454 is a wasteful number, since it uses less digits than its factorization.

40400454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15011.

The product of its (nonzero) digits is 1280, while the sum is 21.

The square root of 40400454 is about 6356.1351464550. The cubic root of 40400454 is about 343.1326796467.

Adding to 40400454 its reverse (45400404), we get a palindrome (85800858).

The spelling of 40400454 in words is "forty million, four hundred thousand, four hundred fifty-four".