55701990 has 48 divisors (see below), whose sum is σ = 145752048. Its totient is φ = 14758848.

The previous prime is 55701973. The next prime is 55702007. The reversal of 55701990 is 9910755.

It is a happy number.

55701990 is a `hidden beast` number, since 557 + 0 + 19 + 90 = 666.

It is an interprime number because it is at equal distance from previous prime (55701973) and next prime (55702007).

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, 12772 + ... + 16568.

It is an arithmetic number, because the mean of its divisors is an integer number (3036501).

Almost surely, 2^55701990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55701990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72876024).

55701990 is an abundant number, since it is smaller than the sum of its proper divisors (90050058).

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

55701990 is a wasteful number, since it uses less digits than its factorization.

55701990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3973 (or 3970 counting only the distinct ones).

The product of its (nonzero) digits is 14175, while the sum is 36.

The square root of 55701990 is about 7463.3765816820. The cubic root of 55701990 is about 381.9063712494.

The spelling of 55701990 in words is "fifty-five million, seven hundred one thousand, nine hundred ninety".