153400640 has 28 divisors (see below), whose sum is σ = 365286036. Its totient is φ = 61360128.

The previous prime is 153400619. The next prime is 153400669. The reversal of 153400640 is 46004351.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 21977344 + 131423296 = 4688^2 + 11464^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 239369 + ... + 240008.

Almost surely, 2^153400640 is an apocalyptic number.

153400640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

153400640 is an abundant number, since it is smaller than the sum of its proper divisors (211885396).

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

153400640 is an equidigital number, since it uses as much as digits as its factorization.

153400640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479394 (or 479384 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 153400640 is about 12385.5012010011. The cubic root of 153400640 is about 535.3145615696.

Adding to 153400640 its reverse (46004351), we get a palindrome (199404991).

The spelling of 153400640 in words is "one hundred fifty-three million, four hundred thousand, six hundred forty".