1466247640 has 64 divisors (see below), whose sum is σ = 3875830560. Its totient is φ = 492165120.

The previous prime is 1466247611. The next prime is 1466247661. The reversal of 1466247640 is 467426641.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 1466247593 and 1466247602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122449 + ... + 133888.

Almost surely, 2^1466247640 is an apocalyptic number.

1466247640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1466247640 is an abundant number, since it is smaller than the sum of its proper divisors (2409582920).

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

1466247640 is a wasteful number, since it uses less digits than its factorization.

1466247640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256372 (or 256368 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 40.

The square root of 1466247640 is about 38291.6131809565. The cubic root of 1466247640 is about 1136.0630688882.

The spelling of 1466247640 in words is "one billion, four hundred sixty-six million, two hundred forty-seven thousand, six hundred forty".