40019925 has 48 divisors (see below), whose sum is σ = 72852480. Its totient is φ = 19224000.

The previous prime is 40019911. The next prime is 40019933. The reversal of 40019925 is 52991004.

It is a happy number.

It is not a de Polignac number, because 40019925 - 2¹¹ = 40017877 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40019892 and 40019901.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 147540 + ... + 147810.

It is an arithmetic number, because the mean of its divisors is an integer number (1517760).

Almost surely, 2^40019925 is an apocalyptic number.

It is an amenable number.

40019925 is a deficient number, since it is larger than the sum of its proper divisors (32832555).

40019925 is a wasteful number, since it uses less digits than its factorization.

40019925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474 (or 469 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 40019925 is about 6326.1303337823. The cubic root of 40019925 is about 342.0519653604.

The spelling of 40019925 in words is "forty million, nineteen thousand, nine hundred twenty-five".