451409490 has 64 divisors (see below), whose sum is σ = 1375729920. Its totient is φ = 103178880.

The previous prime is 451409473. The next prime is 451409503. The reversal of 451409490 is 94904154.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 117531 + ... + 121310.

It is an arithmetic number, because the mean of its divisors is an integer number (21495780).

Almost surely, 2^451409490 is an apocalyptic number.

451409490 is an abundant number, since it is smaller than the sum of its proper divisors (924320430).

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

451409490 is a wasteful number, since it uses less digits than its factorization.

451409490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238864 (or 238858 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 451409490 is about 21246.3994596732. The cubic root of 451409490 is about 767.1086766439.

The spelling of 451409490 in words is "four hundred fifty-one million, four hundred nine thousand, four hundred ninety".