154914640 has 20 divisors (see below), whose sum is σ = 360176724. Its totient is φ = 61965824.

The previous prime is 154914631. The next prime is 154914649. The reversal of 154914640 is 46419451.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (154914631) and next prime (154914649).

It can be written as a sum of positive squares in 2 ways, for example, as 52823824 + 102090816 = 7268^2 + 10104^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 154914596 and 154914605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154914649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 968137 + ... + 968296.

Almost surely, 2^154914640 is an apocalyptic number.

154914640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

154914640 is an abundant number, since it is smaller than the sum of its proper divisors (205262084).

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

154914640 is a wasteful number, since it uses less digits than its factorization.

154914640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1936446 (or 1936440 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 154914640 is about 12446.4709857855. The cubic root of 154914640 is about 537.0699094172.

The spelling of 154914640 in words is "one hundred fifty-four million, nine hundred fourteen thousand, six hundred forty".