55340390 has 32 divisors (see below), whose sum is σ = 114903360. Its totient is φ = 18797184.

The previous prime is 55340387. The next prime is 55340437. The reversal of 55340390 is 9304355.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4004 + ... + 11256.

It is an arithmetic number, because the mean of its divisors is an integer number (3590730).

Almost surely, 2^55340390 is an apocalyptic number.

55340390 is an abundant number, since it is smaller than the sum of its proper divisors (59562970).

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

55340390 is a wasteful number, since it uses less digits than its factorization.

55340390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7376.

The product of its (nonzero) digits is 8100, while the sum is 29.

The square root of 55340390 is about 7439.1121782105. The cubic root of 55340390 is about 381.0781707094.

The spelling of 55340390 in words is "fifty-five million, three hundred forty thousand, three hundred ninety".