1261670928 has 40 divisors (see below), whose sum is σ = 3724934208. Its totient is φ = 360477312.

The previous prime is 1261670887. The next prime is 1261670933. The reversal of 1261670928 is 8290761621.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 1261670928.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1877151 + ... + 1877822.

Almost surely, 2^1261670928 is an apocalyptic number.

It is an amenable number.

1261670928 is an abundant number, since it is smaller than the sum of its proper divisors (2463263280).

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

1261670928 is a wasteful number, since it uses less digits than its factorization.

1261670928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3754991 (or 3754985 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 1261670928 is about 35520.0074324317. The cubic root of 1261670928 is about 1080.5595317385.

The spelling of 1261670928 in words is "one billion, two hundred sixty-one million, six hundred seventy thousand, nine hundred twenty-eight".