49197780 has 144 divisors (see below), whose sum is σ = 158505984. Its totient is φ = 12804480.

The previous prime is 49197773. The next prime is 49197787. The reversal of 49197780 is 8779194.

49197780 is a `hidden beast` number, since 491 + 97 + 78 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (49197773) and next prime (49197787).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49197787) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 257485 + ... + 257675.

It is an arithmetic number, because the mean of its divisors is an integer number (1100736).

Almost surely, 2^49197780 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 49197780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79252992).

49197780 is an abundant number, since it is smaller than the sum of its proper divisors (109308204).

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

49197780 is a wasteful number, since it uses less digits than its factorization.

49197780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268 (or 254 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 45.

The square root of 49197780 is about 7014.1129161142. The cubic root of 49197780 is about 366.4222484949.

The spelling of 49197780 in words is "forty-nine million, one hundred ninety-seven thousand, seven hundred eighty".