70687818 has 24 divisors (see below), whose sum is σ = 153597600. Its totient is φ = 23494824.

The previous prime is 70687807. The next prime is 70687823. The reversal of 70687818 is 81878607.

It is a super-2 number, since 2×70687818² = 9993535227202248, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 993 + ... + 11931.

It is an arithmetic number, because the mean of its divisors is an integer number (6399900).

Almost surely, 2^70687818 is an apocalyptic number.

70687818 is an abundant number, since it is smaller than the sum of its proper divisors (82909782).

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

70687818 is a wasteful number, since it uses less digits than its factorization.

70687818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11306 (or 11303 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 45.

The square root of 70687818 is about 8407.6047718717. The cubic root of 70687818 is about 413.4739871353.

The spelling of 70687818 in words is "seventy million, six hundred eighty-seven thousand, eight hundred eighteen".