70290 has 48 divisors (see below), whose sum is σ = 202176. Its totient is φ = 16800.

The previous prime is 70289. The next prime is 70297. The reversal of 70290 is 9207.

70290 = T₄ + T₅ + ... + T₇₄.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (70297) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 955 + ... + 1025.

It is an arithmetic number, because the mean of its divisors is an integer number (4212).

2⁷⁰²⁹⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 70290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101088).

70290 is an abundant number, since it is smaller than the sum of its proper divisors (131886).

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

70290 is a wasteful number, since it uses less digits than its factorization.

70290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95 (or 92 counting only the distinct ones).

The product of its (nonzero) digits is 126, while the sum is 18.

The square root of 70290 is about 265.1226131434. The cubic root of 70290 is about 41.2696875718.

Adding to 70290 its reverse (9207), we get a palindrome (79497).

The spelling of 70290 in words is "seventy thousand, two hundred ninety".