465640 has 32 divisors (see below), whose sum is σ = 1198080. Its totient is φ = 159552.

The previous prime is 465631. The next prime is 465643. The reversal of 465640 is 46564.

465640 = T₂₁ + T₂₂ + ... + T₁₄₀.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (465643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 552 + ... + 1111.

It is an arithmetic number, because the mean of its divisors is an integer number (37440).

2⁴⁶⁵⁶⁴⁰ is an apocalyptic number.

465640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

465640 is an abundant number, since it is smaller than the sum of its proper divisors (732440).

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

465640 is a wasteful number, since it uses less digits than its factorization.

465640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1681 (or 1677 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 465640 is about 682.3781942589. The cubic root of 465640 is about 77.5086358743.

The spelling of 465640 in words is "four hundred sixty-five thousand, six hundred forty".