70394940 has 192 divisors, whose sum is σ = 273208320. Its totient is φ = 14618880.

The previous prime is 70394921. The next prime is 70394941. The reversal of 70394940 is 4949307.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 70394895 and 70394904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70394941) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 40734 + ... + 42426.

It is an arithmetic number, because the mean of its divisors is an integer number (1422960).

Almost surely, 2^70394940 is an apocalyptic number.

70394940 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 70394940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (136604160).

70394940 is an abundant number, since it is smaller than the sum of its proper divisors (202813380).

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

70394940 is a wasteful number, since it uses less digits than its factorization.

70394940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1729 (or 1721 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 70394940 is about 8390.1692473990. The cubic root of 70394940 is about 412.9021532611.

The spelling of 70394940 in words is "seventy million, three hundred ninety-four thousand, nine hundred forty".