1151015440 has 40 divisors (see below), whose sum is σ = 2816962560. Its totient is φ = 436173696.

The previous prime is 1151015431. The next prime is 1151015449. The reversal of 1151015440 is 445101511.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1151015431) and next prime (1151015449).

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (1151015449) 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, 377104 + ... + 380143.

It is an arithmetic number, because the mean of its divisors is an integer number (70424064).

Almost surely, 2^1151015440 is an apocalyptic number.

1151015440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1151015440 is an abundant number, since it is smaller than the sum of its proper divisors (1665947120).

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

1151015440 is a wasteful number, since it uses less digits than its factorization.

1151015440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 757279 (or 757273 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 22.

The square root of 1151015440 is about 33926.6184580780. The cubic root of 1151015440 is about 1047.9978293761.

Adding to 1151015440 its reverse (445101511), we get a palindrome (1596116951).

The spelling of 1151015440 in words is "one billion, one hundred fifty-one million, fifteen thousand, four hundred forty".