1210781152 has 48 divisors (see below), whose sum is σ = 2742616800. Its totient is φ = 515409408.

The previous prime is 1210781149. The next prime is 1210781153. The reversal of 1210781152 is 2511870121.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 1210781152.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210781153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15238 + ... + 51514.

It is an arithmetic number, because the mean of its divisors is an integer number (57137850).

Almost surely, 2^1210781152 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 1210781152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1371308400).

1210781152 is an abundant number, since it is smaller than the sum of its proper divisors (1531835648).

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

1210781152 is a wasteful number, since it uses less digits than its factorization.

1210781152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36443 (or 36435 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 28.

The square root of 1210781152 is about 34796.2807207897. The cubic root of 1210781152 is about 1065.8314979942.

The spelling of 1210781152 in words is "one billion, two hundred ten million, seven hundred eighty-one thousand, one hundred fifty-two".