1621412436 has 48 divisors (see below), whose sum is σ = 4332182400. Its totient is φ = 462359040.

The previous prime is 1621412389. The next prime is 1621412447. The reversal of 1621412436 is 6342141261.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

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, 25240 + ... + 62288.

It is an arithmetic number, because the mean of its divisors is an integer number (90253800).

Almost surely, 2^1621412436 is an apocalyptic number.

It is an amenable number.

1621412436 is an abundant number, since it is smaller than the sum of its proper divisors (2710769964).

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

1621412436 is a wasteful number, since it uses less digits than its factorization.

1621412436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37584 (or 37582 counting only the distinct ones).

The product of its digits is 6912, while the sum is 30.

The square root of 1621412436 is about 40266.7658994362. The cubic root of 1621412436 is about 1174.8015203606.

Adding to 1621412436 its reverse (6342141261), we get a palindrome (7963553697).

The spelling of 1621412436 in words is "one billion, six hundred twenty-one million, four hundred twelve thousand, four hundred thirty-six".