1326467640 has 64 divisors (see below), whose sum is σ = 4003292160. Its totient is φ = 351601280.

The previous prime is 1326467603. The next prime is 1326467647. The reversal of 1326467640 is 467646231.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1326467647) 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, 13056 + ... + 53135.

It is an arithmetic number, because the mean of its divisors is an integer number (62551440).

Almost surely, 2^1326467640 is an apocalyptic number.

1326467640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1326467640 is an abundant number, since it is smaller than the sum of its proper divisors (2676824520).

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

1326467640 is a wasteful number, since it uses less digits than its factorization.

1326467640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66372 (or 66368 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 39.

The square root of 1326467640 is about 36420.7034528440. The cubic root of 1326467640 is about 1098.7499960525.

The spelling of 1326467640 in words is "one billion, three hundred twenty-six million, four hundred sixty-seven thousand, six hundred forty".