408997090 has 16 divisors (see below), whose sum is σ = 741072960. Its totient is φ = 162514800.

The previous prime is 408997087. The next prime is 408997091. The reversal of 408997090 is 90799804.

It is a self number, because there is not a number n which added to its sum of digits gives 408997090.

It is not an unprimeable number, because it can be changed into a prime (408997091) 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, 133920 + ... + 136939.

It is an arithmetic number, because the mean of its divisors is an integer number (46317060).

Almost surely, 2^408997090 is an apocalyptic number.

408997090 is a deficient number, since it is larger than the sum of its proper divisors (332075870).

408997090 is a wasteful number, since it uses less digits than its factorization.

408997090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271017.

The product of its (nonzero) digits is 163296, while the sum is 46.

The square root of 408997090 is about 20223.6764709090. The cubic root of 408997090 is about 742.2896515928.

The spelling of 408997090 in words is "four hundred eight million, nine hundred ninety-seven thousand, ninety".