1025691870 has 32 divisors (see below), whose sum is σ = 2813326848. Its totient is φ = 234443808.

The previous prime is 1025691809. The next prime is 1025691893. The reversal of 1025691870 is 781965201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2441914 + ... + 2442333.

It is an arithmetic number, because the mean of its divisors is an integer number (87916464).

Almost surely, 2^1025691870 is an apocalyptic number.

1025691870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1025691870 is an abundant number, since it is smaller than the sum of its proper divisors (1787634978).

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

1025691870 is a wasteful number, since it uses less digits than its factorization.

1025691870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4884264.

The product of its (nonzero) digits is 30240, while the sum is 39.

The square root of 1025691870 is about 32026.4245584798. The cubic root of 1025691870 is about 1008.4916445345.

The spelling of 1025691870 in words is "one billion, twenty-five million, six hundred ninety-one thousand, eight hundred seventy".