445907390 has 32 divisors (see below), whose sum is σ = 865499040. Its totient is φ = 164851200.

The previous prime is 445907381. The next prime is 445907401. The reversal of 445907390 is 93709544.

It is a super-2 number, since 2×445907390² = 397666800913224200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20831 + ... + 36410.

It is an arithmetic number, because the mean of its divisors is an integer number (27046845).

Almost surely, 2^445907390 is an apocalyptic number.

445907390 is a deficient number, since it is larger than the sum of its proper divisors (419591650).

445907390 is a wasteful number, since it uses less digits than its factorization.

445907390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57308.

The product of its (nonzero) digits is 136080, while the sum is 41.

The square root of 445907390 is about 21116.5193628117. The cubic root of 445907390 is about 763.9792386288.

The spelling of 445907390 in words is "four hundred forty-five million, nine hundred seven thousand, three hundred ninety".