55780350 has 24 divisors (see below), whose sum is σ = 138335640. Its totient is φ = 14874720.

The previous prime is 55780339. The next prime is 55780357. The reversal of 55780350 is 5308755.

It is a super-2 number, since 2×55780350² = 6222894892245000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55780357) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 185785 + ... + 186084.

It is an arithmetic number, because the mean of its divisors is an integer number (5763985).

Almost surely, 2^55780350 is an apocalyptic number.

55780350 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55780350 is an abundant number, since it is smaller than the sum of its proper divisors (82555290).

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

55780350 is a wasteful number, since it uses less digits than its factorization.

55780350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371884 (or 371879 counting only the distinct ones).

The product of its (nonzero) digits is 21000, while the sum is 33.

The square root of 55780350 is about 7468.6243713284. The cubic root of 55780350 is about 382.0853724012.

The spelling of 55780350 in words is "fifty-five million, seven hundred eighty thousand, three hundred fifty".