99278070 has 16 divisors (see below), whose sum is σ = 238267440. Its totient is φ = 26474144.

The previous prime is 99278041. The next prime is 99278077. The reversal of 99278070 is 7087299.

It is a super-2 number, since 2×99278070² = 19712270365849800, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99278077) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1654605 + ... + 1654664.

It is an arithmetic number, because the mean of its divisors is an integer number (14891715).

Almost surely, 2^99278070 is an apocalyptic number.

99278070 is an abundant number, since it is smaller than the sum of its proper divisors (138989370).

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

99278070 is a wasteful number, since it uses less digits than its factorization.

99278070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3309279.

The product of its (nonzero) digits is 63504, while the sum is 42.

The square root of 99278070 is about 9963.8381159069. The cubic root of 99278070 is about 463.0392172122.

The spelling of 99278070 in words is "ninety-nine million, two hundred seventy-eight thousand, seventy".