90400629 has 16 divisors (see below), whose sum is σ = 132125184. Its totient is φ = 54524400.

The previous prime is 90400601. The next prime is 90400633. The reversal of 90400629 is 92600409.

It is not a de Polignac number, because 90400629 - 2⁷ = 90400501 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 90400596 and 90400605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90400699) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 472 + ... + 13454.

It is an arithmetic number, because the mean of its divisors is an integer number (8257824).

Almost surely, 2^90400629 is an apocalyptic number.

It is an amenable number.

90400629 is a deficient number, since it is larger than the sum of its proper divisors (41724555).

90400629 is a wasteful number, since it uses less digits than its factorization.

90400629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13208.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 90400629 is about 9507.9245369323. The cubic root of 90400629 is about 448.8044462354.

The spelling of 90400629 in words is "ninety million, four hundred thousand, six hundred twenty-nine".