49209870 has 32 divisors (see below), whose sum is σ = 119532672. Its totient is φ = 12963872.

The previous prime is 49209869. The next prime is 49209871. The reversal of 49209870 is 7890294.

It is an interprime number because it is at equal distance from previous prime (49209869) and next prime (49209871).

It is a super-2 number, since 2×49209870² = 4843222610833800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49209871) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7392 + ... + 12371.

It is an arithmetic number, because the mean of its divisors is an integer number (3735396).

Almost surely, 2^49209870 is an apocalyptic number.

49209870 is an abundant number, since it is smaller than the sum of its proper divisors (70322802).

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

49209870 is a wasteful number, since it uses less digits than its factorization.

49209870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19856.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 49209870 is about 7014.9746970321. The cubic root of 49209870 is about 366.4522612458.

The spelling of 49209870 in words is "forty-nine million, two hundred nine thousand, eight hundred seventy".