1620415232 has 36 divisors (see below), whose sum is σ = 3246575136. Its totient is φ = 807183360.

The previous prime is 1620415219. The next prime is 1620415249. The reversal of 1620415232 is 2325140261.

It is a happy number.

It is a super-2 number, since 2×1620415232² = 5251491048195227648, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57698 + ... + 81054.

Almost surely, 2^1620415232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1620415232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1623287568).

1620415232 is an abundant number, since it is smaller than the sum of its proper divisors (1626159904).

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

1620415232 is an equidigital number, since it uses as much as digits as its factorization.

1620415232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23644 (or 23630 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 1620415232 is about 40254.3815254936. The cubic root of 1620415232 is about 1174.5606281194.

Adding to 1620415232 its reverse (2325140261), we get a palindrome (3945555493).

The spelling of 1620415232 in words is "one billion, six hundred twenty million, four hundred fifteen thousand, two hundred thirty-two".