74220154 has 4 divisors (see below), whose sum is σ = 111330234. Its totient is φ = 37110076.

The previous prime is 74220131. The next prime is 74220163. The reversal of 74220154 is 45102247.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 72335025 + 1885129 = 8505^2 + 1373^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18555037 + ... + 18555040.

Almost surely, 2^74220154 is an apocalyptic number.

74220154 is a deficient number, since it is larger than the sum of its proper divisors (37110080).

74220154 is a wasteful number, since it uses less digits than its factorization.

74220154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37110079.

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 74220154 is about 8615.1119551634. Note that the first 3 decimals coincide. The cubic root of 74220154 is about 420.2495757776.

The spelling of 74220154 in words is "seventy-four million, two hundred twenty thousand, one hundred fifty-four".