1547212990 has 16 divisors (see below), whose sum is σ = 2906070048. Its totient is φ = 591977056.

The previous prime is 1547212987. The next prime is 1547212999. The reversal of 1547212990 is 992127451.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1547212999) 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, 3363277 + ... + 3363736.

It is an arithmetic number, because the mean of its divisors is an integer number (181629378).

Almost surely, 2^1547212990 is an apocalyptic number.

1547212990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1547212990 is a deficient number, since it is larger than the sum of its proper divisors (1358857058).

1547212990 is a wasteful number, since it uses less digits than its factorization.

1547212990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6727043.

The product of its (nonzero) digits is 45360, while the sum is 40.

The square root of 1547212990 is about 39334.6283826351. The cubic root of 1547212990 is about 1156.6004785501.

The spelling of 1547212990 in words is "one billion, five hundred forty-seven million, two hundred twelve thousand, nine hundred ninety".