445903690 has 16 divisors (see below), whose sum is σ = 828518400. Its totient is φ = 172607760.

The previous prime is 445903673. The next prime is 445903697. The reversal of 445903690 is 96309544.

It is a super-2 number, since 2×445903690² = 397660201511232200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (445903697) 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, 718890 + ... + 719509.

It is an arithmetic number, because the mean of its divisors is an integer number (51782400).

Almost surely, 2^445903690 is an apocalyptic number.

445903690 is a deficient number, since it is larger than the sum of its proper divisors (382614710).

445903690 is a wasteful number, since it uses less digits than its factorization.

445903690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1438437.

The product of its (nonzero) digits is 116640, while the sum is 40.

The square root of 445903690 is about 21116.4317534947. The cubic root of 445903690 is about 763.9771255361.

The spelling of 445903690 in words is "four hundred forty-five million, nine hundred three thousand, six hundred ninety".