87428119 has 4 divisors (see below), whose sum is σ = 87985144. Its totient is φ = 86871096.

The previous prime is 87428087. The next prime is 87428141. The reversal of 87428119 is 91182478.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91182478 = 2 ⋅45591239.

It is a cyclic number.

It is not a de Polignac number, because 87428119 - 2⁵ = 87428087 is a prime.

It is a super-2 number, since 2×87428119² = 15287351983756322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87428219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 278277 + ... + 278590.

It is an arithmetic number, because the mean of its divisors is an integer number (21996286).

Almost surely, 2^87428119 is an apocalyptic number.

87428119 is a deficient number, since it is larger than the sum of its proper divisors (557025).

87428119 is a wasteful number, since it uses less digits than its factorization.

87428119 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557024.

The product of its digits is 32256, while the sum is 40.

The square root of 87428119 is about 9350.3004764553. The cubic root of 87428119 is about 443.8303991333.

It can be divided in two parts, 8742 and 8119, that added together give a palindrome (16861).

The spelling of 87428119 in words is "eighty-seven million, four hundred twenty-eight thousand, one hundred nineteen".