1140427731 has 16 divisors (see below), whose sum is σ = 1529749760. Its totient is φ = 755710560.

The previous prime is 1140427723. The next prime is 1140427763. The reversal of 1140427731 is 1377240411.

It is not a de Polignac number, because 1140427731 - 2³ = 1140427723 is a prime.

It is a super-2 number, since 2×1140427731² = 2601150819267616722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1140427831) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 368850 + ... + 371928.

It is an arithmetic number, because the mean of its divisors is an integer number (95609360).

Almost surely, 2^1140427731 is an apocalyptic number.

1140427731 is a deficient number, since it is larger than the sum of its proper divisors (389322029).

1140427731 is a wasteful number, since it uses less digits than its factorization.

1140427731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3786.

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 1140427731 is about 33770.2195876781. The cubic root of 1140427731 is about 1044.7745615357.

The spelling of 1140427731 in words is "one billion, one hundred forty million, four hundred twenty-seven thousand, seven hundred thirty-one".