2478987 has 36 divisors (see below), whose sum is σ = 4358640. Its totient is φ = 1329696.

The previous prime is 2478953. The next prime is 2478997. The reversal of 2478987 is 7898742.

2478987 = T₅₈ + T₅₉ + ... + T₂₄₆.

It is not a de Polignac number, because 2478987 - 2⁸ = 2478731 is a prime.

It is a super-2 number, since 2×2478987² = 12290753092338, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2478937) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 22689 + ... + 22797.

2^2478987 is an apocalyptic number.

2478987 is a deficient number, since it is larger than the sum of its proper divisors (1879653).

2478987 is a wasteful number, since it uses less digits than its factorization.

2478987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160 (or 138 counting only the distinct ones).

The product of its digits is 225792, while the sum is 45.

The square root of 2478987 is about 1574.4799141304. The cubic root of 2478987 is about 135.3395567415.

The spelling of 2478987 in words is "two million, four hundred seventy-eight thousand, nine hundred eighty-seven".