2523978 has 12 divisors (see below), whose sum is σ = 5468658. Its totient is φ = 841320.

The previous prime is 2523967. The next prime is 2523991. The reversal of 2523978 is 8793252.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2350089 + 173889 = 1533^2 + 417^2 .

It is a d-powerful number, because it can be written as 2² + 5⁸ + 2¹⁴ + 3⁹ + 9² + 7² + 8⁷ .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 70093 + ... + 70128.

2^2523978 is an apocalyptic number.

2523978 is an abundant number, since it is smaller than the sum of its proper divisors (2944680).

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

2523978 is a wasteful number, since it uses less digits than its factorization.

2523978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140229 (or 140226 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 2523978 is about 1588.7032447880. The cubic root of 2523978 is about 136.1534096436.

It can be divided in two parts, 252397 and 8, that added together give a triangular number (252405 = T₇₁₀).

The spelling of 2523978 in words is "two million, five hundred twenty-three thousand, nine hundred seventy-eight".