149220778 has 32 divisors (see below), whose sum is σ = 268128000. Its totient is φ = 62212752.

The previous prime is 149220769. The next prime is 149220779. The reversal of 149220778 is 877022941.

It is a self number, because there is not a number n which added to its sum of digits gives 149220778.

It is not an unprimeable number, because it can be changed into a prime (149220779) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22443 + ... + 28321.

It is an arithmetic number, because the mean of its divisors is an integer number (8379000).

Almost surely, 2^149220778 is an apocalyptic number.

149220778 is a deficient number, since it is larger than the sum of its proper divisors (118907222).

149220778 is an equidigital number, since it uses as much as digits as its factorization.

149220778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5939 (or 5925 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 149220778 is about 12215.5956874808. The cubic root of 149220778 is about 530.4076346604.

The spelling of 149220778 in words is "one hundred forty-nine million, two hundred twenty thousand, seven hundred seventy-eight".