431623620 has 48 divisors (see below), whose sum is σ = 1342830720. Its totient is φ = 115099488.

The previous prime is 431623553. The next prime is 431623631. The reversal of 431623620 is 26326134.

431623620 is a `hidden beast` number, since 4 + 3 + 16 + 23 + 620 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 399112 + ... + 400191.

It is an arithmetic number, because the mean of its divisors is an integer number (27975640).

Almost surely, 2^431623620 is an apocalyptic number.

It is an amenable number.

431623620 is an abundant number, since it is smaller than the sum of its proper divisors (911207100).

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

431623620 is a wasteful number, since it uses less digits than its factorization.

431623620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 799321 (or 799313 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 431623620 is about 20775.5534222316. The cubic root of 431623620 is about 755.7330249047.

Adding to 431623620 its reverse (26326134), we get a palindrome (457949754).

The spelling of 431623620 in words is "four hundred thirty-one million, six hundred twenty-three thousand, six hundred twenty".