70778790 has 24 divisors (see below), whose sum is σ = 184025088. Its totient is φ = 18874320.

The previous prime is 70778779. The next prime is 70778791. The reversal of 70778790 is 9787707.

It is a super-2 number, since 2×70778790² = 10019274227728200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70778791) 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, 393126 + ... + 393305.

It is an arithmetic number, because the mean of its divisors is an integer number (7667712).

Almost surely, 2^70778790 is an apocalyptic number.

70778790 is an abundant number, since it is smaller than the sum of its proper divisors (113246298).

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

70778790 is a wasteful number, since it uses less digits than its factorization.

70778790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 786444 (or 786441 counting only the distinct ones).

The product of its (nonzero) digits is 172872, while the sum is 45.

The square root of 70778790 is about 8413.0131344246. The cubic root of 70778790 is about 413.6512851577.

It can be divided in two parts, 707 and 78790, that added together give a palindrome (79497).

The spelling of 70778790 in words is "seventy million, seven hundred seventy-eight thousand, seven hundred ninety".