78150794 has 4 divisors (see below), whose sum is σ = 117226194. Its totient is φ = 39075396.

The previous prime is 78150773. The next prime is 78150799. The reversal of 78150794 is 49705187.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 43494025 + 34656769 = 6595^2 + 5887^2 .

It is a super-2 number, since 2×78150794² = 12215093205660872, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78150799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19537697 + ... + 19537700.

Almost surely, 2^78150794 is an apocalyptic number.

78150794 is a deficient number, since it is larger than the sum of its proper divisors (39075400).

78150794 is a wasteful number, since it uses less digits than its factorization.

78150794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39075399.

The product of its (nonzero) digits is 70560, while the sum is 41.

The square root of 78150794 is about 8840.2937733992. The cubic root of 78150794 is about 427.5410290865.

The spelling of 78150794 in words is "seventy-eight million, one hundred fifty thousand, seven hundred ninety-four".