154946640 has 40 divisors (see below), whose sum is σ = 480335328. Its totient is φ = 41319040.

The previous prime is 154946633. The next prime is 154946717. The reversal of 154946640 is 46649451.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×154946640² = 48016922494579200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 322566 + ... + 323045.

Almost surely, 2^154946640 is an apocalyptic number.

154946640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

154946640 is an abundant number, since it is smaller than the sum of its proper divisors (325388688).

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

154946640 is a wasteful number, since it uses less digits than its factorization.

154946640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645627 (or 645621 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 39.

The square root of 154946640 is about 12447.7564243521. The cubic root of 154946640 is about 537.1068868861.

The spelling of 154946640 in words is "one hundred fifty-four million, nine hundred forty-six thousand, six hundred forty".