78350775 has 24 divisors (see below), whose sum is σ = 136360320. Its totient is φ = 39587040.

The previous prime is 78350771. The next prime is 78350777. The reversal of 78350775 is 57705387.

It is not a de Polignac number, because 78350775 - 2² = 78350771 is a prime.

It is a super-2 number, since 2×78350775² = 12277687886201250, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78350771) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26067 + ... + 28916.

It is an arithmetic number, because the mean of its divisors is an integer number (5681680).

Almost surely, 2^78350775 is an apocalyptic number.

78350775 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

78350775 is a deficient number, since it is larger than the sum of its proper divisors (58009545).

78350775 is a wasteful number, since it uses less digits than its factorization.

78350775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55015 (or 55010 counting only the distinct ones).

The product of its (nonzero) digits is 205800, while the sum is 42.

The square root of 78350775 is about 8851.5973134796. The cubic root of 78350775 is about 427.9053984150.

The spelling of 78350775 in words is "seventy-eight million, three hundred fifty thousand, seven hundred seventy-five".