154640420 has 36 divisors (see below), whose sum is σ = 356956572. Its totient is φ = 56232000.

The previous prime is 154640401. The next prime is 154640443. The reversal of 154640420 is 24046451.

It can be written as a sum of positive squares in 2 ways, for example, as 107827456 + 46812964 = 10384^2 + 6842^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 154640420.

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 11 ways as a sum of consecutive naturals, for example, 29531 + ... + 34370.

Almost surely, 2^154640420 is an apocalyptic number.

154640420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

154640420 is an abundant number, since it is smaller than the sum of its proper divisors (202316152).

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

154640420 is a wasteful number, since it uses less digits than its factorization.

154640420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63932 (or 63919 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 154640420 is about 12435.4501325847. The cubic root of 154640420 is about 536.7528266348.

Adding to 154640420 its reverse (24046451), we get a palindrome (178686871).

The spelling of 154640420 in words is "one hundred fifty-four million, six hundred forty thousand, four hundred twenty".