78300550 has 24 divisors (see below), whose sum is σ = 146091096. Its totient is φ = 31223040.

The previous prime is 78300511. The next prime is 78300559. The reversal of 78300550 is 5500387.

It is a super-2 number, since 2×78300550² = 12261952260605000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78300559) 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, 15094 + ... + 19606.

It is an arithmetic number, because the mean of its divisors is an integer number (6087129).

Almost surely, 2^78300550 is an apocalyptic number.

78300550 is a deficient number, since it is larger than the sum of its proper divisors (67790546).

78300550 is a wasteful number, since it uses less digits than its factorization.

78300550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4872 (or 4867 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 78300550 is about 8848.7598001076. The cubic root of 78300550 is about 427.8139458310.

The spelling of 78300550 in words is "seventy-eight million, three hundred thousand, five hundred fifty".