70428540 has 96 divisors (see below), whose sum is σ = 242726400. Its totient is φ = 14858496.

The previous prime is 70428517. The next prime is 70428557. The reversal of 70428540 is 4582407.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 70428498 and 70428507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 990 + ... + 11909.

It is an arithmetic number, because the mean of its divisors is an integer number (2528400).

Almost surely, 2^70428540 is an apocalyptic number.

70428540 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 70428540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121363200).

70428540 is an abundant number, since it is smaller than the sum of its proper divisors (172297860).

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

70428540 is a wasteful number, since it uses less digits than its factorization.

70428540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12931 (or 12929 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 30.

The square root of 70428540 is about 8392.1713519208. The cubic root of 70428540 is about 412.9678365125.

The spelling of 70428540 in words is "seventy million, four hundred twenty-eight thousand, five hundred forty".