1455664240 has 40 divisors (see below), whose sum is σ = 3389501808. Its totient is φ = 581391360.

The previous prime is 1455664237. The next prime is 1455664261. The reversal of 1455664240 is 424665541.

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

It is a super-2 number, since 2×1455664240² = 4237916759229555200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1455664240.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41320 + ... + 67960.

Almost surely, 2^1455664240 is an apocalyptic number.

1455664240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1455664240 is an abundant number, since it is smaller than the sum of its proper divisors (1933837568).

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

1455664240 is a wasteful number, since it uses less digits than its factorization.

1455664240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27337 (or 27331 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 37.

The square root of 1455664240 is about 38153.1681515441. The cubic root of 1455664240 is about 1133.3230917952.

The spelling of 1455664240 in words is "one billion, four hundred fifty-five million, six hundred sixty-four thousand, two hundred forty".