1240996428 has 72 divisors (see below), whose sum is σ = 3682023072. Its totient is φ = 344984832.

The previous prime is 1240996417. The next prime is 1240996429. The reversal of 1240996428 is 8246990421.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1240996429) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 57225 + ... + 75872.

Almost surely, 2^1240996428 is an apocalyptic number.

1240996428 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1240996428 is an abundant number, since it is smaller than the sum of its proper divisors (2441026644).

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

1240996428 is a wasteful number, since it uses less digits than its factorization.

1240996428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133151 (or 133146 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 1240996428 is about 35227.7792090276. The cubic root of 1240996428 is about 1074.6247626358.

The spelling of 1240996428 in words is "one billion, two hundred forty million, nine hundred ninety-six thousand, four hundred twenty-eight".