620671456 has 36 divisors (see below), whose sum is σ = 1265590872. Its totient is φ = 299621504.

The previous prime is 620671379. The next prime is 620671483. The reversal of 620671456 is 654176026.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15381 + ... + 38443.

It is an arithmetic number, because the mean of its divisors is an integer number (35155302).

Almost surely, 2^620671456 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 620671456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (632795436).

620671456 is an abundant number, since it is smaller than the sum of its proper divisors (644919416).

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

620671456 is a wasteful number, since it uses less digits than its factorization.

620671456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23131 (or 23094 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 620671456 is about 24913.2787083515. The cubic root of 620671456 is about 853.0096108229.

The spelling of 620671456 in words is "six hundred twenty million, six hundred seventy-one thousand, four hundred fifty-six".