1620951330 has 32 divisors (see below), whose sum is σ = 3900312000. Its totient is φ = 431139392.

The previous prime is 1620951329. The next prime is 1620951337. The reversal of 1620951330 is 331590261.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (1620951337) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57780 + ... + 81119.

It is an arithmetic number, because the mean of its divisors is an integer number (121884750).

Almost surely, 2^1620951330 is an apocalyptic number.

1620951330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1620951330 is an abundant number, since it is smaller than the sum of its proper divisors (2279360670).

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

1620951330 is a wasteful number, since it uses less digits than its factorization.

1620951330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139298.

The product of its (nonzero) digits is 4860, while the sum is 30.

The square root of 1620951330 is about 40261.0398524430. The cubic root of 1620951330 is about 1174.6901443411.

The spelling of 1620951330 in words is "one billion, six hundred twenty million, nine hundred fifty-one thousand, three hundred thirty".