55307378 has 32 divisors (see below), whose sum is σ = 99408000. Its totient is φ = 23051952.

The previous prime is 55307353. The next prime is 55307381. The reversal of 55307378 is 87370355.

It is a happy number.

It is a super-2 number, since 2×55307378² = 6117812122469768, which contains 22 as substring.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

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, 24293 + ... + 26471.

It is an arithmetic number, because the mean of its divisors is an integer number (3106500).

Almost surely, 2^55307378 is an apocalyptic number.

55307378 is a deficient number, since it is larger than the sum of its proper divisors (44100622).

55307378 is a wasteful number, since it uses less digits than its factorization.

55307378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2239 (or 2225 counting only the distinct ones).

The product of its (nonzero) digits is 88200, while the sum is 38.

The square root of 55307378 is about 7436.8930340566. The cubic root of 55307378 is about 381.0023812491.

The spelling of 55307378 in words is "fifty-five million, three hundred seven thousand, three hundred seventy-eight".