1985257948 has 6 divisors (see below), whose sum is σ = 3474201416. Its totient is φ = 992628972.

The previous prime is 1985257907. The next prime is 1985257961. The reversal of 1985257948 is 8497525891.

It is a junction number, because it is equal to n+sod(n) for n = 1985257892 and 1985257901.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 248157240 + ... + 248157247.

Almost surely, 2^1985257948 is an apocalyptic number.

It is an amenable number.

1985257948 is a deficient number, since it is larger than the sum of its proper divisors (1488943468).

1985257948 is a wasteful number, since it uses less digits than its factorization.

1985257948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496314491 (or 496314489 counting only the distinct ones).

The product of its digits is 7257600, while the sum is 58.

The square root of 1985257948 is about 44556.2335481804. The cubic root of 1985257948 is about 1256.8177756486.

The spelling of 1985257948 in words is "one billion, nine hundred eighty-five million, two hundred fifty-seven thousand, nine hundred forty-eight".