1655732890 has 32 divisors (see below), whose sum is σ = 3437343360. Its totient is φ = 562469184.

The previous prime is 1655732863. The next prime is 1655732891. The reversal of 1655732890 is 982375561.

It is a super-3 number, since 3×1655732890³ (a number of 29 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1655732890.

It is not an unprimeable number, because it can be changed into a prime (1655732891) 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, 100872 + ... + 116131.

It is an arithmetic number, because the mean of its divisors is an integer number (107416980).

Almost surely, 2^1655732890 is an apocalyptic number.

1655732890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1655732890 is an abundant number, since it is smaller than the sum of its proper divisors (1781610470).

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

1655732890 is a wasteful number, since it uses less digits than its factorization.

1655732890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217126.

The product of its (nonzero) digits is 453600, while the sum is 46.

The square root of 1655732890 is about 40690.6978313226. The cubic root of 1655732890 is about 1183.0327260400.

The spelling of 1655732890 in words is "one billion, six hundred fifty-five million, seven hundred thirty-two thousand, eight hundred ninety".