77217150 has 48 divisors (see below), whose sum is σ = 196688304. Its totient is φ = 20033280.

The previous prime is 77217109. The next prime is 77217181. The reversal of 77217150 is 5171277.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1407 + ... + 12506.

It is an arithmetic number, because the mean of its divisors is an integer number (4097673).

Almost surely, 2^77217150 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77217150, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98344152).

77217150 is an abundant number, since it is smaller than the sum of its proper divisors (119471154).

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

77217150 is a wasteful number, since it uses less digits than its factorization.

77217150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13965 (or 13960 counting only the distinct ones).

The product of its (nonzero) digits is 3430, while the sum is 30.

The square root of 77217150 is about 8787.3289457036. The cubic root of 77217150 is about 425.8316357313.

The spelling of 77217150 in words is "seventy-seven million, two hundred seventeen thousand, one hundred fifty".