1623431420 has 24 divisors (see below), whose sum is σ = 3671453184. Its totient is φ = 599420736.

The previous prime is 1623431413. The next prime is 1623431477. The reversal of 1623431420 is 241343261.

It is a super-3 number, since 3×1623431420³ (a number of 29 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 1623431420.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3121724 + ... + 3122243.

It is an arithmetic number, because the mean of its divisors is an integer number (152977216).

Almost surely, 2^1623431420 is an apocalyptic number.

1623431420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1623431420 is an abundant number, since it is smaller than the sum of its proper divisors (2048021764).

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

1623431420 is a wasteful number, since it uses less digits than its factorization.

1623431420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6243989 (or 6243987 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 1623431420 is about 40291.8282037437. The cubic root of 1623431420 is about 1175.2889393543.

Adding to 1623431420 its reverse (241343261), we get a palindrome (1864774681).

The spelling of 1623431420 in words is "one billion, six hundred twenty-three million, four hundred thirty-one thousand, four hundred twenty".