70472820 has 144 divisors (see below), whose sum is σ = 230053824. Its totient is φ = 16051200.

The previous prime is 70472797. The next prime is 70472839. The reversal of 70472820 is 2827407.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 123135 + ... + 123705.

It is an arithmetic number, because the mean of its divisors is an integer number (1597596).

Almost surely, 2^70472820 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 70472820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115026912).

70472820 is an abundant number, since it is smaller than the sum of its proper divisors (159581004).

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

70472820 is a wasteful number, since it uses less digits than its factorization.

70472820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 622 (or 609 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 30.

The square root of 70472820 is about 8394.8091103967. The cubic root of 70472820 is about 413.0543657558.

The spelling of 70472820 in words is "seventy million, four hundred seventy-two thousand, eight hundred twenty".