1864840925 has 24 divisors (see below), whose sum is σ = 2508167592. Its totient is φ = 1369856000.

The previous prime is 1864840919. The next prime is 1864840931. The reversal of 1864840925 is 5290484681.

It is an interprime number because it is at equal distance from previous prime (1864840919) and next prime (1864840931).

It can be written as a sum of positive squares in 12 ways, for example, as 1281425209 + 583415716 = 35797^2 + 24154^2 .

It is not a de Polignac number, because 1864840925 - 2¹⁰ = 1864839901 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1864840925.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36086 + ... + 70935.

It is an arithmetic number, because the mean of its divisors is an integer number (104506983).

Almost surely, 2^1864840925 is an apocalyptic number.

It is an amenable number.

1864840925 is a deficient number, since it is larger than the sum of its proper divisors (643326667).

1864840925 is a wasteful number, since it uses less digits than its factorization.

1864840925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107089 (or 107084 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 47.

The square root of 1864840925 is about 43183.8039663020. The cubic root of 1864840925 is about 1230.8749420645.

The spelling of 1864840925 in words is "one billion, eight hundred sixty-four million, eight hundred forty thousand, nine hundred twenty-five".