1465661940 has 48 divisors (see below), whose sum is σ = 4105842048. Its totient is φ = 390653824.

The previous prime is 1465661903. The next prime is 1465661941. The reversal of 1465661940 is 491665641.

It is a junction number, because it is equal to n+sod(n) for n = 1465661892 and 1465661901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1465661941) 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, 155194 + ... + 164366.

It is an arithmetic number, because the mean of its divisors is an integer number (85538376).

Almost surely, 2^1465661940 is an apocalyptic number.

1465661940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1465661940 is an abundant number, since it is smaller than the sum of its proper divisors (2640180108).

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

1465661940 is a wasteful number, since it uses less digits than its factorization.

1465661940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11848 (or 11846 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 1465661940 is about 38283.9645282460. The cubic root of 1465661940 is about 1135.9117800383.

The spelling of 1465661940 in words is "one billion, four hundred sixty-five million, six hundred sixty-one thousand, nine hundred forty".