78238794 has 32 divisors (see below), whose sum is σ = 170168256. Its totient is φ = 23880960.

The previous prime is 78238793. The next prime is 78238807. The reversal of 78238794 is 49783287.

It is a super-2 number, since 2×78238794² = 12242617773148872, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78238793) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6592 + ... + 14139.

It is an arithmetic number, because the mean of its divisors is an integer number (5317758).

Almost surely, 2^78238794 is an apocalyptic number.

78238794 is a gapful number since it is divisible by the number (74) formed by its first and last digit.

78238794 is an abundant number, since it is smaller than the sum of its proper divisors (91929462).

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

78238794 is a wasteful number, since it uses less digits than its factorization.

78238794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20790.

The product of its digits is 677376, while the sum is 48.

The square root of 78238794 is about 8845.2695832292. The cubic root of 78238794 is about 427.7014433136.

The spelling of 78238794 in words is "seventy-eight million, two hundred thirty-eight thousand, seven hundred ninety-four".