55379990 has 32 divisors (see below), whose sum is σ = 102137760. Its totient is φ = 21613824.

The previous prime is 55379977. The next prime is 55379993. The reversal of 55379990 is 9997355.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55379993) 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, 77756 + ... + 78464.

It is an arithmetic number, because the mean of its divisors is an integer number (3191805).

Almost surely, 2^55379990 is an apocalyptic number.

55379990 is a deficient number, since it is larger than the sum of its proper divisors (46757770).

55379990 is a wasteful number, since it uses less digits than its factorization.

55379990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 896.

The product of its (nonzero) digits is 382725, while the sum is 47.

The square root of 55379990 is about 7441.7733101728. The cubic root of 55379990 is about 381.1690452497.

The spelling of 55379990 in words is "fifty-five million, three hundred seventy-nine thousand, nine hundred ninety".