1620940854 has 48 divisors (see below), whose sum is σ = 3716975952. Its totient is φ = 469407744.

The previous prime is 1620940843. The next prime is 1620940879. The reversal of 1620940854 is 4580490261.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29779 + ... + 64254.

It is an arithmetic number, because the mean of its divisors is an integer number (77436999).

Almost surely, 2^1620940854 is an apocalyptic number.

1620940854 is an abundant number, since it is smaller than the sum of its proper divisors (2096035098).

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

1620940854 is a wasteful number, since it uses less digits than its factorization.

1620940854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94081 (or 94068 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 1620940854 is about 40260.9097512711. The cubic root of 1620940854 is about 1174.6876137118.

The spelling of 1620940854 in words is "one billion, six hundred twenty million, nine hundred forty thousand, eight hundred fifty-four".