450291640 has 32 divisors (see below), whose sum is σ = 1066482000. Its totient is φ = 170636544.

The previous prime is 450291629. The next prime is 450291641. The reversal of 450291640 is 46192054.

It is a super-2 number, since 2×450291640² = 405525122107779200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (450291641) 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, 295485 + ... + 297004.

Almost surely, 2^450291640 is an apocalyptic number.

450291640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

450291640 is an abundant number, since it is smaller than the sum of its proper divisors (616190360).

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

450291640 is a wasteful number, since it uses less digits than its factorization.

450291640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 592519 (or 592515 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 450291640 is about 21220.0763429352. The cubic root of 450291640 is about 766.4749421865.

The spelling of 450291640 in words is "four hundred fifty million, two hundred ninety-one thousand, six hundred forty".