70909940 has 12 divisors (see below), whose sum is σ = 148910916. Its totient is φ = 28363968.

The previous prime is 70909933. The next prime is 70909961. The reversal of 70909940 is 4990907.

It can be written as a sum of positive squares in 2 ways, for example, as 43744996 + 27164944 = 6614^2 + 5212^2 .

It is a junction number, because it is equal to n+sod(n) for n = 70909894 and 70909903.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1772729 + ... + 1772768.

It is an arithmetic number, because the mean of its divisors is an integer number (12409243).

Almost surely, 2^70909940 is an apocalyptic number.

It is an amenable number.

70909940 is an abundant number, since it is smaller than the sum of its proper divisors (78000976).

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

70909940 is a wasteful number, since it uses less digits than its factorization.

70909940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3545506 (or 3545504 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 38.

The square root of 70909940 is about 8420.8039996190. The cubic root of 70909940 is about 413.9066200900.

The spelling of 70909940 in words is "seventy million, nine hundred nine thousand, nine hundred forty".