1401761856 has 56 divisors (see below), whose sum is σ = 4046000544. Its totient is φ = 424775680.

The previous prime is 1401761849. The next prime is 1401761857. The reversal of 1401761856 is 6581671041.

It is not an unprimeable number, because it can be changed into a prime (1401761857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 329745 + ... + 333968.

Almost surely, 2^1401761856 is an apocalyptic number.

1401761856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1401761856 is an abundant number, since it is smaller than the sum of its proper divisors (2644238688).

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

1401761856 is a wasteful number, since it uses less digits than its factorization.

1401761856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 663739 (or 663729 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 39.

The square root of 1401761856 is about 37440.1102562479. The cubic root of 1401761856 is about 1119.1580236532.

The spelling of 1401761856 in words is "one billion, four hundred one million, seven hundred sixty-one thousand, eight hundred fifty-six".