136440464 has 10 divisors (see below), whose sum is σ = 264353430. Its totient is φ = 68220224.

The previous prime is 136440461. The next prime is 136440467. The reversal of 136440464 is 464044631.

It is an interprime number because it is at equal distance from previous prime (136440461) and next prime (136440467).

It can be written as a sum of positive squares in only one way, i.e., 133171600 + 3268864 = 11540^2 + 1808^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 136440464.

It is not an unprimeable number, because it can be changed into a prime (136440461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4263749 + ... + 4263780.

It is an arithmetic number, because the mean of its divisors is an integer number (26435343).

Almost surely, 2^136440464 is an apocalyptic number.

It is an amenable number.

136440464 is a deficient number, since it is larger than the sum of its proper divisors (127912966).

136440464 is an equidigital number, since it uses as much as digits as its factorization.

136440464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8527537 (or 8527531 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 32.

The square root of 136440464 is about 11680.7732620747. The cubic root of 136440464 is about 514.8108948457.

The spelling of 136440464 in words is "one hundred thirty-six million, four hundred forty thousand, four hundred sixty-four".