87420118 has 16 divisors (see below), whose sum is σ = 137457936. Its totient is φ = 41650560.

The previous prime is 87420107. The next prime is 87420119. The reversal of 87420118 is 81102478.

It is a super-2 number, since 2×87420118² = 15284554062267848, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 87420118.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87420119) 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, 8871 + ... + 15922.

It is an arithmetic number, because the mean of its divisors is an integer number (8591121).

Almost surely, 2^87420118 is an apocalyptic number.

87420118 is a deficient number, since it is larger than the sum of its proper divisors (50037818).

87420118 is a wasteful number, since it uses less digits than its factorization.

87420118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24879.

The product of its (nonzero) digits is 3584, while the sum is 31.

The square root of 87420118 is about 9349.8726194532. The cubic root of 87420118 is about 443.8168596474.

The spelling of 87420118 in words is "eighty-seven million, four hundred twenty thousand, one hundred eighteen".