1662365628 has 72 divisors (see below), whose sum is σ = 5238979200. Its totient is φ = 431782560.

The previous prime is 1662365599. The next prime is 1662365657. The reversal of 1662365628 is 8265632661.

1662365628 is a `hidden beast` number, since 1 + 66 + 23 + 6 + 562 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (1662365599) and next prime (1662365657).

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, 297078 + ... + 302621.

It is an arithmetic number, because the mean of its divisors is an integer number (72763600).

Almost surely, 2^1662365628 is an apocalyptic number.

1662365628 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1662365628 is an abundant number, since it is smaller than the sum of its proper divisors (3576613572).

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

1662365628 is a wasteful number, since it uses less digits than its factorization.

1662365628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 599727 (or 599722 counting only the distinct ones).

The product of its digits is 622080, while the sum is 45.

The square root of 1662365628 is about 40772.1182672669. The cubic root of 1662365628 is about 1184.6103338779.

The spelling of 1662365628 in words is "one billion, six hundred sixty-two million, three hundred sixty-five thousand, six hundred twenty-eight".