1331426040 has 96 divisors (see below), whose sum is σ = 4646425680. Its totient is φ = 304324608.

The previous prime is 1331426029. The next prime is 1331426053. The reversal of 1331426040 is 406241331.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1331426040.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 107337 + ... + 119096.

Almost surely, 2^1331426040 is an apocalyptic number.

1331426040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1331426040 is an abundant number, since it is smaller than the sum of its proper divisors (3314999640).

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

1331426040 is a wasteful number, since it uses less digits than its factorization.

1331426040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226461 (or 226450 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 1331426040 is about 36488.7111309786. The cubic root of 1331426040 is about 1100.1173538708.

Adding to 1331426040 its reverse (406241331), we get a palindrome (1737667371).

The spelling of 1331426040 in words is "one billion, three hundred thirty-one million, four hundred twenty-six thousand, forty".