70528290 has 128 divisors (see below), whose sum is σ = 206184960. Its totient is φ = 15095808.

The previous prime is 70528267. The next prime is 70528309. The reversal of 70528290 is 9282507.

It is a Curzon number.

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, 225174 + ... + 225486.

It is an arithmetic number, because the mean of its divisors is an integer number (1610820).

Almost surely, 2^70528290 is an apocalyptic number.

70528290 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 70528290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103092480).

70528290 is an abundant number, since it is smaller than the sum of its proper divisors (135656670).

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

70528290 is a wasteful number, since it uses less digits than its factorization.

70528290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396.

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 70528290 is about 8398.1122878895. The cubic root of 70528290 is about 413.1627106791.

The spelling of 70528290 in words is "seventy million, five hundred twenty-eight thousand, two hundred ninety".