70998930 has 160 divisors (see below), whose sum is σ = 206578944. Its totient is φ = 17449344.

The previous prime is 70998929. The next prime is 70998943. The reversal of 70998930 is 3989907.

It is a happy number.

It is a super-2 number, since 2×70998930² = 10081696122289800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 689259 + ... + 689361.

Almost surely, 2^70998930 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 70998930, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103289472).

70998930 is an abundant number, since it is smaller than the sum of its proper divisors (135580014).

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

70998930 is a wasteful number, since it uses less digits than its factorization.

70998930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182 (or 173 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

The square root of 70998930 is about 8426.0862801184. The cubic root of 70998930 is about 414.0796948027.

The spelling of 70998930 in words is "seventy million, nine hundred ninety-eight thousand, nine hundred thirty".