70390320 has 320 divisors, whose sum is σ = 293981184. Its totient is φ = 13455360.

The previous prime is 70390301. The next prime is 70390379. The reversal of 70390320 is 2309307.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 240094 + ... + 240386.

Almost surely, 2^70390320 is an apocalyptic number.

70390320 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 70390320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146990592).

70390320 is an abundant number, since it is smaller than the sum of its proper divisors (223590864).

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

70390320 is a wasteful number, since it uses less digits than its factorization.

70390320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340 (or 334 counting only the distinct ones).

The product of its (nonzero) digits is 1134, while the sum is 24.

The square root of 70390320 is about 8389.8939206643. The cubic root of 70390320 is about 412.8931201796.

Adding to 70390320 its reverse (2309307), we get a palindrome (72699627).

The spelling of 70390320 in words is "seventy million, three hundred ninety thousand, three hundred twenty".