1620995376 has 240 divisors, whose sum is σ = 5666915072. Its totient is φ = 388523520.

The previous prime is 1620995347. The next prime is 1620995429. The reversal of 1620995376 is 6735990261.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 526995 + ... + 530061.

Almost surely, 2^1620995376 is an apocalyptic number.

1620995376 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1620995376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2833457536).

1620995376 is an abundant number, since it is smaller than the sum of its proper divisors (4045919696).

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

1620995376 is a wasteful number, since it uses less digits than its factorization.

1620995376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3120 (or 3103 counting only the distinct ones).

The product of its (nonzero) digits is 612360, while the sum is 48.

The square root of 1620995376 is about 40261.5868539729. The cubic root of 1620995376 is about 1174.7007841698.

The spelling of 1620995376 in words is "one billion, six hundred twenty million, nine hundred ninety-five thousand, three hundred seventy-six".