1465264840 has 32 divisors (see below), whose sum is σ = 3550450680. Its totient is φ = 541020672.

The previous prime is 1465264837. The next prime is 1465264859. The reversal of 1465264840 is 484625641.

It can be written as a sum of positive squares in 4 ways, for example, as 1222341444 + 242923396 = 34962^2 + 15586^2 .

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 = 1465264793 and 1465264802.

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, 1408389 + ... + 1409428.

Almost surely, 2^1465264840 is an apocalyptic number.

1465264840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1465264840 is an abundant number, since it is smaller than the sum of its proper divisors (2085185840).

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

1465264840 is a wasteful number, since it uses less digits than its factorization.

1465264840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2817841 (or 2817837 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 40.

The square root of 1465264840 is about 38278.7779324262. Note that the first 3 decimals coincide. The cubic root of 1465264840 is about 1135.8091844582.

The spelling of 1465264840 in words is "one billion, four hundred sixty-five million, two hundred sixty-four thousand, eight hundred forty".