154191944 has 16 divisors (see below), whose sum is σ = 290354220. Its totient is φ = 76764160.

The previous prime is 154191943. The next prime is 154191971. The reversal of 154191944 is 449191451.

It can be written as a sum of positive squares in 2 ways, for example, as 135443044 + 18748900 = 11638^2 + 4330^2 .

It is a junction number, because it is equal to n+sod(n) for n = 154191898 and 154191907.

It is not an unprimeable number, because it can be changed into a prime (154191943) 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, 39497 + ... + 43224.

Almost surely, 2^154191944 is an apocalyptic number.

It is an amenable number.

154191944 is a deficient number, since it is larger than the sum of its proper divisors (136162276).

154191944 is a wasteful number, since it uses less digits than its factorization.

154191944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82960 (or 82956 counting only the distinct ones).

The product of its digits is 25920, while the sum is 38.

The square root of 154191944 is about 12417.4048818584. The cubic root of 154191944 is about 536.2334414210.

The spelling of 154191944 in words is "one hundred fifty-four million, one hundred ninety-one thousand, nine hundred forty-four".