78278296 has 16 divisors (see below), whose sum is σ = 148541400. Its totient is φ = 38667264.

The previous prime is 78278293. The next prime is 78278303. The reversal of 78278296 is 69287287.

It is a super-2 number, since 2×78278296² = 12254983249327232, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78278293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58281 + ... + 59608.

Almost surely, 2^78278296 is an apocalyptic number.

It is an amenable number.

78278296 is a deficient number, since it is larger than the sum of its proper divisors (70263104).

78278296 is a wasteful number, since it uses less digits than its factorization.

78278296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117978 (or 117974 counting only the distinct ones).

The product of its digits is 677376, while the sum is 49.

The square root of 78278296 is about 8847.5022463970. The cubic root of 78278296 is about 427.7734119580.

The spelling of 78278296 in words is "seventy-eight million, two hundred seventy-eight thousand, two hundred ninety-six".