438706890 has 48 divisors (see below), whose sum is σ = 1159984800. Its totient is φ = 115004256.

The previous prime is 438706861. The next prime is 438706907. The reversal of 438706890 is 98607834.

It is a happy number.

438706890 is a `hidden beast` number, since 438 + 70 + 68 + 90 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36000 + ... + 46619.

It is an arithmetic number, because the mean of its divisors is an integer number (24166350).

Almost surely, 2^438706890 is an apocalyptic number.

438706890 is an abundant number, since it is smaller than the sum of its proper divisors (721277910).

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

438706890 is a wasteful number, since it uses less digits than its factorization.

438706890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82691 (or 82688 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 438706890 is about 20945.3309833003. The cubic root of 438706890 is about 759.8446646985.

The spelling of 438706890 in words is "four hundred thirty-eight million, seven hundred six thousand, eight hundred ninety".