490989154 has 4 divisors (see below), whose sum is σ = 736483734. Its totient is φ = 245494576.

The previous prime is 490989143. The next prime is 490989157. The reversal of 490989154 is 451989094.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 451989094 = 2 ⋅225994547.

It can be written as a sum of positive squares in only one way, i.e., 387499225 + 103489929 = 19685^2 + 10173^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 490989098 and 490989107.

It is not an unprimeable number, because it can be changed into a prime (490989157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122747287 + ... + 122747290.

Almost surely, 2^490989154 is an apocalyptic number.

490989154 is a deficient number, since it is larger than the sum of its proper divisors (245494580).

490989154 is a wasteful number, since it uses less digits than its factorization.

490989154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245494579.

The product of its (nonzero) digits is 466560, while the sum is 49.

The square root of 490989154 is about 22158.2750682448. The cubic root of 490989154 is about 788.9036514580.

The spelling of 490989154 in words is "four hundred ninety million, nine hundred eighty-nine thousand, one hundred fifty-four".