1623542472 has 24 divisors (see below), whose sum is σ = 4397094390. Its totient is φ = 541180800.

The previous prime is 1623542461. The next prime is 1623542489. The reversal of 1623542472 is 2742453261.

1623542472 is a `hidden beast` number, since 1 + 62 + 354 + 247 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1343515716 + 280026756 = 36654^2 + 16734^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11274529 + ... + 11274672.

Almost surely, 2^1623542472 is an apocalyptic number.

1623542472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1623542472 is an abundant number, since it is smaller than the sum of its proper divisors (2773551918).

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

1623542472 is a wasteful number, since it uses less digits than its factorization.

1623542472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22549213 (or 22549206 counting only the distinct ones).

The product of its digits is 80640, while the sum is 36.

The square root of 1623542472 is about 40293.2062759965. The cubic root of 1623542472 is about 1175.3157375731.

The spelling of 1623542472 in words is "one billion, six hundred twenty-three million, five hundred forty-two thousand, four hundred seventy-two".