1264029040 has 20 divisors (see below), whose sum is σ = 2938867704. Its totient is φ = 505611584.

The previous prime is 1264029037. The next prime is 1264029043. The reversal of 1264029040 is 409204621.

It is an interprime number because it is at equal distance from previous prime (1264029037) and next prime (1264029043).

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1264029043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7900102 + ... + 7900261.

Almost surely, 2^1264029040 is an apocalyptic number.

1264029040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1264029040 is an abundant number, since it is smaller than the sum of its proper divisors (1674838664).

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

1264029040 is a wasteful number, since it uses less digits than its factorization.

1264029040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15800376 (or 15800370 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 1264029040 is about 35553.1860738247. The cubic root of 1264029040 is about 1081.2323153466.

The spelling of 1264029040 in words is "one billion, two hundred sixty-four million, twenty-nine thousand, forty".