1655493940 has 24 divisors (see below), whose sum is σ = 3659513760. Its totient is φ = 627344928.

The previous prime is 1655493907. The next prime is 1655493943. The reversal of 1655493940 is 493945561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1655493943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2177902 + ... + 2178661.

It is an arithmetic number, because the mean of its divisors is an integer number (152479740).

Almost surely, 2^1655493940 is an apocalyptic number.

1655493940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1655493940 is an abundant number, since it is smaller than the sum of its proper divisors (2004019820).

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

1655493940 is a wasteful number, since it uses less digits than its factorization.

1655493940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4356591 (or 4356589 counting only the distinct ones).

The product of its (nonzero) digits is 583200, while the sum is 46.

The square root of 1655493940 is about 40687.7615506186. The cubic root of 1655493940 is about 1182.9758128202.

The spelling of 1655493940 in words is "one billion, six hundred fifty-five million, four hundred ninety-three thousand, nine hundred forty".